terraform/CHANGELOG.md

0.6.0 (Unreleased)

BACKWARDS INCOMPATIBILITIES:

• connection/ssh: The agent field now defaults to true if the SSH_AGENT_SOCK environment variable is present. In other words, ssh-agent support is now opt-out instead of opt-in functionality. [GH-2408]
• concat() has been repurposed to combine lists instead of strings (old behavior of joining strings is maintained in this version but is deprecated, strings should be combined using interpolation syntax, like "${var.foo}{var.bar}") [GH-1790]

FEATURES:

• New provider: azure [GH-2052, GH-2053, GH-2372, GH-2380, GH-2394]
• New resource: aws_autoscaling_notification [GH-2197]
• New resource: aws_autoscaling_policy [GH-2201]
• New resource: aws_cloudwatch_metric_alarm [GH-2201]
• New resource: aws_dynamodb_table [GH-2121]
• New resource: aws_ecs_cluster [GH-1803]
• New resource: aws_ecs_service [GH-1803]
• New resource: aws_ecs_task_definition [GH-1803]
• New resource: aws_flow_log [GH-2384]
• New resource: aws_iam_group_association [GH-2273]
• New resource: aws_lambda_function [GH-2170]
• New resource: aws_route53_delegation_set [GH-1999]
• New resource: aws_route53_health_check [GH-2226]
• New resource: aws_spot_instance_request [GH-2263]
• New resource: cloudstack_ssh_keypair [GH-2004]
• New remote state backend: swift: You can now store remote state in a OpenStack Swift. [GH-2254]
• command/output: support display of module outputs [GH-2102]
• core: keys() and values() funcs for map variables [GH-2198]
• connection/ssh: SSH bastion host support and ssh-agent forwarding [GH-2425]

IMPROVEMENTS:

• core: HTTP remote state now accepts skip_cert_verification option to ignore TLS cert verification. [GH-2214]
• core: S3 remote state now accepts the 'encrypt' option for SSE [GH-2405]
• core: plan now reports sum of resources to be changed/created/destroyed [GH-2458]
• core: Change string list representation so we can distinguish empty, single element lists [GH-2504]
• provider/aws: AutoScaling groups now support updating Load Balancers without recreation [GH-2472]
• provider/aws: Allow more in-place updates for ElastiCache cluster without recreating [GH-2469]
• provider/aws: ElastiCache Subnet Groups can be updated without destroying first [GH-2191]
• provider/aws: Normalize certificate_chain in aws_iam_servier_certificate to prevent unnecessary replacement. [GH-2411]
• provider/aws: aws_instance supports `monitoring' [GH-2489]
• provider/aws: aws_launch_configuration now supports enable_monitoring [GH-2410]
• provider/aws: Show outputs after terraform refresh [GH-2347]
• provider/aws: Add backoff/throttling during DynamoDB creation [GH-2462]
• provider/docker: docker_container has the privileged option. [GH-2227]
• provider/openstack: allow OS_AUTH_TOKEN environment variable to set the openstack api_key field [GH-2234]
• provider/openstack: Can now configure endpoint type (public, admin, internal) [GH-2262]
• provider/cloudstack: cloudstack_instance now supports projects [GH-2115]
• provisioner/chef: Added a os_type to specifically specify the target OS [GH-2483]
• provisioner/chef: Added a ohai_hints option to upload hint files [GH-2487]

BUG FIXES:

• core: lifecycle prevent_destroy can be any value that can be coerced into a bool [GH-2268]
• core: matching provider types in sibling modules won't override each other's config. [GH-2464]
• core: computed provider configurations now properly validate [GH-2457]
• core: orphan (commented out) resource dependencies are destroyed in the correct order [GH-2453]
• core: validate object types in plugins are actually objects [GH-2450]
• core: fix -no-color flag in subcommands [GH-2414]
• core: Fix error of 'attribute not found for variable' when a computed resource attribute is used as a parameter to a module [GH-2477]
• core: moduled orphans will properly inherit provider configs [GH-2476]
• core: modules with provider aliases work properly if the parent doesn't implement those aliases [GH-2475]
• core: unknown resource attributes passed in as parameters to modules now error [GH-2478]
• core: better error messages for missing variables [GH-2479]
• command/*: fixed bug where variable input was not asked for unset vars if terraform.tfvars existed [GH-2502]
• command/apply: prevent output duplication when reporting errors [GH-2267]
• provider/aws: fix panic when route has no cidr_block [GH-2215]
• provider/aws: fix issue preventing destruction of IAM Roles [GH-2177]
• provider/aws: fix issue where Security Group Rules could collide and fail to save to the state file correctly [GH-2376]
• provider/aws: fix issue preventing destruction self referencing Securtity Group Rules [GH-2305]
• provider/aws: fix issue causing perpetual diff on ELB listeners when non-lowercase protocol strings were used [GH-2246]
• provider/aws: corrected frankfurt S3 website region [GH-2259]
• provider/aws: aws_elasticache_cluster port is required [GH-2160]
• provider/aws: Handle AMIs where RootBlockDevice does not appear in the BlockDeviceMapping, preventing root_block_device from working [GH-2271]
• provider/aws: fix terraform show with remote state [GH-2371]
• provider/aws: detect instance_type drift on aws_instance [GH-2374]
• provider/aws: fix crash when security_group_rule referenced non-existent security group [GH-2434]
• provider/aws: aws_launch_configuration retries if IAM instance profile is not ready yet. [GH-2452]
• provider/openstack: fix panic case if API returns nil network [GH-2448]
• provider/template: fix issue causing "unknown variable" rendering errors when an existing set of template variables is changed [GH-2386]
• provisioner/chef: improve the decoding logic to prevent parameter not found errors [GH-2206]

0.5.3 (June 1, 2015)

IMPROVEMENTS:

• New resource: aws_kinesis_stream [GH-2110]
• New resource: aws_iam_server_certificate [GH-2086]
• New resource: aws_sqs_queue [GH-1939]
• New resource: aws_sns_topic [GH-1974]
• New resource: aws_sns_topic_subscription [GH-1974]
• New resource: aws_volume_attachment [GH-2050]
• New resource: google_storage_bucket [GH-2060]
• provider/aws: support ec2 termination protection [GH-1988]
• provider/aws: support for RDS Read Replicas [GH-1946]
• provider/aws: aws_s3_bucket add support for policy [GH-1992]
• provider/aws: aws_ebs_volume add support for tags [GH-2135]
• provider/aws: aws_elasticache_cluster Confirm node status before reporting available
• provider/aws: aws_network_acl Add support for ICMP Protocol [GH-2148]
• provider/aws: New force_destroy parameter for S3 buckets, to destroy Buckets that contain objects [GH-2007]
• provider/aws: switching health_check_type on ASGs no longer requires resource refresh [GH-2147]
• provider/aws: ignore empty vpc_security_group_ids on aws_instance [GH-2311]

BUG FIXES:

• provider/aws: Correctly handle AWS keypairs which no longer exist [GH-2032]
• provider/aws: Fix issue with restoring an Instance from snapshot ID [GH-2120]
• provider/template: store relative path in the state [GH-2038]
• provisioner/chef: fix interpolation in the Chef provisioner [GH-2168]
• provisioner/remote-exec: Don't prepend shebang on scripts that already have one [GH-2041]

0.5.2 (May 15, 2015)

FEATURES:

• Chef provisioning: You can now provision new hosts (both Linux and Windows) with Chef using a native provisioner [GH-1868]

IMPROVEMENTS:

• New config function: formatlist - Format lists in a similar way to format. Useful for creating URLs from a list of IPs. [GH-1829]
• New resource: aws_route53_zone_association
• provider/aws: aws_autoscaling_group can wait for capacity in ELB via min_elb_capacity [GH-1970]
• provider/aws: aws_db_instances supports license_model [GH-1966]
• provider/aws: aws_elasticache_cluster add support for Tags [GH-1965]
• provider/aws: aws_network_acl Network ACLs can be applied to multiple subnets [GH-1931]
• provider/aws: aws_s3_bucket exports hosted_zone_id and region [GH-1865]
• provider/aws: aws_s3_bucket add support for website redirect_all_requests_to [GH-1909]
• provider/aws: aws_route53_record exports fqdn [GH-1847]
• provider/aws: aws_route53_zone can create private hosted zones [GH-1526]
• provider/google: google_compute_instance scratch attribute added [GH-1920]

BUG FIXES:

• core: fix "resource not found" for interpolation issues with modules
• core: fix unflattenable error for orphans [GH-1922]
• core: fix deadlock with create-before-destroy + modules [GH-1949]
• core: fix "no roots found" error with create-before-destroy [GH-1953]
• core: variables set with environment variables won't validate as not set without a default [GH-1930]
• core: resources with a blank ID in the state are now assumed to not exist [GH-1905]
• command/push: local vars override remote ones [GH-1881]
• provider/aws: Mark aws_security_group description as ForceNew [GH-1871]
• provider/aws: aws_db_instance ARN value is correct [GH-1910]
• provider/aws: aws_db_instance only submit modify request if there is a change. [GH-1906]
• provider/aws: aws_elasticache_cluster export missing information on cluster nodes [GH-1965]
• provider/aws: bad AMI on a launch configuration won't block refresh [GH-1901]
• provider/aws: aws_security_group + aws_subnet - destroy timeout increased to prevent DependencyViolation errors. [GH-1886]
• provider/google: google_compute_instance Local SSDs no-longer cause crash [GH-1088]
• provider/google: google_http_health_check Defaults now driven from Terraform, avoids errors on update [GH-1894]
• provider/google: google_compute_template Update Instance Template network definition to match changes to Instance [GH-980]
• provider/template: Fix infinite diff [GH-1898]

0.5.1 (never released)

This version was never released since we accidentally skipped it!

0.5.0 (May 7, 2015)

BACKWARDS INCOMPATIBILITIES:

• provider/aws: Terraform now remove the default egress rule created by AWS in a new security group.

FEATURES:

• Multi-provider (a.k.a multi-region): Multiple instances of a single provider can be configured so resources can apply to different settings. As an example, this allows Terraform to manage multiple regions with AWS.
• Environmental variables to set variables: Environment variables can be used to set variables. The environment variables must be in the format TF_VAR_name and this will be checked last for a value.
• New remote state backend: s3: You can now store remote state in an S3 bucket. [GH-1723]
• Automatic AWS retries: This release includes a lot of improvement around automatic retries of transient errors in AWS. The number of retry attempts is also configurable.
• Templates: A new template_file resource allows long strings needing variable interpolation to be moved into files. [GH-1778]
• Provision with WinRM: Provisioners can now run remote commands on Windows hosts. [GH-1483]

IMPROVEMENTS:

• New config function: length - Get the length of a string or a list. Useful in conjunction with split. [GH-1495]
• New resource: aws_app_cookie_stickiness_policy
• New resource: aws_customer_gateway
• New resource: aws_ebs_volume
• New resource: aws_elasticache_cluster
• New resource: aws_elasticache_security_group
• New resource: aws_elasticache_subnet_group
• New resource: aws_iam_access_key
• New resource: aws_iam_group_policy
• New resource: aws_iam_group
• New resource: aws_iam_instance_profile
• New resource: aws_iam_policy
• New resource: aws_iam_role_policy
• New resource: aws_iam_role
• New resource: aws_iam_user_policy
• New resource: aws_iam_user
• New resource: aws_lb_cookie_stickiness_policy
• New resource: aws_proxy_protocol_policy
• New resource: aws_security_group_rule
• New resource: aws_vpc_dhcp_options_association
• New resource: aws_vpc_dhcp_options
• New resource: aws_vpn_connection_route
• New resource: google_dns_managed_zone
• New resource: google_dns_record_set
• Migrate to upstream AWS SDK: Migrate the AWS provider to awslabs/aws-sdk-go, the official awslabs library. Previously we had forked the library for stability while awslabs refactored. Now that work has completed, and we've migrated back to the upstream version.
• core: Improve error message on diff mismatch [GH-1501]
• provisioner/file: expand ~ in source path [GH-1569]
• provider/aws: Better retry logic, now retries up to 11 times by default with exponentional backoff. This number is configurable. [GH-1787]
• provider/aws: Improved credential detection [GH-1470]
• provider/aws: Can specify a token via the config file [GH-1601]
• provider/aws: Added new vpc_security_group_ids attribute for AWS Instances. If using a VPC, you can now modify the security groups for that Instance without destroying it [GH-1539]
• provider/aws: White or blacklist account IDs that can be used to protect against accidents. [GH-1595]
• provider/aws: Add a subset of IAM resources [GH-939]
• provider/aws: aws_autoscaling_group retries deletes through "in progress" errors [GH-1840]
• provider/aws: aws_autoscaling_group waits for healthy capacity during ASG creation [GH-1839]
• provider/aws: aws_instance supports placement groups [GH-1358]
• provider/aws: aws_eip supports network interface attachment [GH-1681]
• provider/aws: aws_elb supports in-place changing of listeners [GH-1619]
• provider/aws: aws_elb supports connection draining settings [GH-1502]
• provider/aws: aws_elb increase default idle timeout to 60s [GH-1646]
• provider/aws: aws_key_pair name can be omitted and generated [GH-1751]
• provider/aws: aws_network_acl improved validation for network ACL ports and protocols [GH-1798] [GH-1808]
• provider/aws: aws_route_table can target network interfaces [GH-968]
• provider/aws: aws_route_table can specify propagating VGWs [GH-1516]
• provider/aws: aws_route53_record supports weighted sets [GH-1578]
• provider/aws: aws_route53_zone exports nameservers [GH-1525]
• provider/aws: aws_s3_bucket website support [GH-1738]
• provider/aws: aws_security_group name becomes optional and can be automatically set to a unique identifier; this helps with create_before_destroy scenarios [GH-1632]
• provider/aws: aws_security_group description becomes optional with a static default value [GH-1632]
• provider/aws: automatically set the private IP as the SSH address if not specified and no public IP is available [GH-1623]
• provider/aws: aws_elb exports source_security_group field [GH-1708]
• provider/aws: aws_route53_record supports alias targeting [GH-1775]
• provider/aws: Remove default AWS egress rule for newly created Security Groups [GH-1765]
• provider/consul: add scheme configuration argument [GH-1838]
• provider/docker: docker_container can specify links [GH-1564]
• provider/google: resource_compute_disk supports snapshots [GH-1426]
• provider/google: resource_compute_instance supports specifying the device name [GH-1426]
• provider/openstack: Floating IP support for LBaaS [GH-1550]
• provider/openstack: Add AZ to openstack_blockstorage_volume_v1 [GH-1726]

BUG FIXES:

• core: Fix graph cycle issues surrounding modules [GH-1582] [GH-1637]
• core: math on arbitrary variables works if first operand isn't a numeric primitive. [GH-1381]
• core: avoid unnecessary cycles by pruning tainted destroys from graph if there are no tainted resources [GH-1475]
• core: fix issue where destroy nodes weren't pruned in specific edge cases around matching prefixes, which could cause cycles [GH-1527]
• core: fix issue causing diff mismatch errors in certain scenarios during resource replacement [GH-1515]
• core: dependencies on resources with a different index work when count > 1 [GH-1540]
• core: don't panic if variable default type is invalid [GH-1344]
• core: fix perpetual diff issue for computed maps that are empty [GH-1607]
• core: validation added to check for self variables in modules [GH-1609]
• core: fix edge case where validation didn't pick up unknown fields if the value was computed [GH-1507]
• core: Fix issue where values in sets on resources couldn't contain hyphens. [GH-1641]
• core: Outputs removed from the config are removed from the state [GH-1714]
• core: Validate against the worst-case graph during plan phase to catch cycles that would previously only show up during apply [GH-1655]
• core: Referencing invalid module output in module validates [GH-1448]
• command: remote states with uppercase types work [GH-1356]
• provider/aws: Support AWS_SECURITY_TOKEN env var again [GH-1785]
• provider/aws: Don't save "instance" for EIP if association fails [GH-1776]
• provider/aws: launch configuration ID set after create success [GH-1518]
• provider/aws: Fixed an issue with creating ELBs without any tags [GH-1580]
• provider/aws: Fix issue in Security Groups with empty IPRanges [GH-1612]
• provider/aws: manually deleted S3 buckets are refreshed properly [GH-1574]
• provider/aws: only check for EIP allocation ID in VPC [GH-1555]
• provider/aws: raw protocol numbers work in aws_network_acl [GH-1435]
• provider/aws: Block devices can be encrypted [GH-1718]
• provider/aws: ASG health check grace period can be updated in-place [GH-1682]
• provider/aws: ELB security groups can be updated in-place [GH-1662]
• provider/aws: aws_main_route_table_association can be deleted manually [GH-1806]
• provider/docker: image can reference more complex image addresses, such as with private repos with ports [GH-1818]
• provider/openstack: region config is not required [GH-1441]
• provider/openstack: enable_dhcp for networking subnet should be bool [GH-1741]
• provisioner/remote-exec: add random number to uploaded script path so that parallel provisions work [GH-1588]
• provisioner/remote-exec: chmod the script to 0755 properly [GH-1796]

0.4.2 (April 10, 2015)

BUG FIXES:

• core: refresh won't remove outputs from state file [GH-1369]
• core: clarify "unknown variable" error [GH-1480]
• core: properly merge parent provider configs when asking for input
• provider/aws: fix panic possibility if RDS DB name is empty [GH-1460]
• provider/aws: fix issue detecting credentials for some resources [GH-1470]
• provider/google: fix issue causing unresolvable diffs when using legacy network field on google_compute_instance [GH-1458]

0.4.1 (April 9, 2015)

IMPROVEMENTS:

• provider/aws: Route 53 records can now update ttl and records attributes without destroying/creating the record [GH-1396]
• provider/aws: Support changing additional attributes of RDS databases without forcing a new resource [GH-1382]

BUG FIXES:

• core: module paths in ".terraform" are consistent across different systems so copying your ".terraform" folder works. [GH-1418]
• core: don't validate providers too early when nested in a module [GH-1380]
• core: fix race condition in count.index interpolation [GH-1454]
• core: properly initialize provisioners, fixing resource targeting during destroy [GH-1544]
• command/push: don't ask for input if terraform.tfvars is present
• command/remote-config: remove spurrious error "nil" when initializing remote state on a new configuration. [GH-1392]
• provider/aws: Fix issue with Route 53 and pre-existing Hosted Zones [GH-1415]
• provider/aws: Fix refresh issue in Route 53 hosted zone [GH-1384]
• provider/aws: Fix issue when changing map-public-ip in Subnets #1234
• provider/aws: Fix issue finding db subnets [GH-1377]
• provider/aws: Fix issues with *_block_device attributes on instances and launch configs creating unresolvable diffs when certain optional parameters were omitted from the config [GH-1445]
• provider/aws: Fix issue with aws_launch_configuration causing an unnecessary diff for pre-0.4 environments [GH-1371]
• provider/aws: Fix several related issues with aws_launch_configuration causing unresolvable diffs [GH-1444]
• provider/aws: Fix issue preventing launch configurations from being valid in EC2 Classic [GH-1412]
• provider/aws: Fix issue in updating Route 53 records on refresh/read. [GH-1430]
• provider/docker: Don't ask for cert_path input on every run [GH-1432]
• provider/google: Fix issue causing unresolvable diff on instances with network_interface [GH-1427]

0.4.0 (April 2, 2015)

BACKWARDS INCOMPATIBILITIES:

• Commands terraform push and terraform pull are now nested under the remote command: terraform remote push and terraform remote pull. The old remote functionality is now at terraform remote config. This consolidates all remote state management under one command.
• Period-prefixed configuration files are now ignored. This might break existing Terraform configurations if you had period-prefixed files.
• The block_device attribute of aws_instance has been removed in favor of three more specific attributes to specify block device mappings: root_block_device, ebs_block_device, and ephemeral_block_device. Configurations using the old attribute will generate a validation error indicating that they must be updated to use the new fields [GH-1045].

FEATURES:

• New provider: dme (DNSMadeEasy) [GH-855]
• New provider: docker (Docker) - Manage container lifecycle using the standard Docker API. [GH-855]
• New provider: openstack (OpenStack) - Interact with the many resources provided by OpenStack. [GH-924]
• New feature: terraform_remote_state resource - Reference remote states from other Terraform runs to use Terraform outputs as inputs into another Terraform run.
• New command: taint - Manually mark a resource as tainted, causing a destroy and recreate on the next plan/apply.
• New resource: aws_vpn_gateway [GH-1137]
• New resource: aws_elastic_network_interfaces [GH-1149]
• Self-variables can be used to reference the current resource's attributes within a provisioner. Ex. ${self.private_ip_address} [GH-1033]
• Continuous state saving during terraform apply. The state file is continuously updated as apply is running, meaning that the state is less likely to become corrupt in a catastrophic case: terraform panic or system killing Terraform.
• Math operations in interpolations. You can now do things like ${count.index+1}. [GH-1068]
• New AWS SDK: Move to aws-sdk-go (hashicorp/aws-sdk-go), a fork of the official awslabs repo. We forked for stability while awslabs refactored the library, and will move back to the officially supported version in the next release.

IMPROVEMENTS:

• New config function: format - Format a string using sprintf format. [GH-1096]
• New config function: replace - Search and replace string values. Search can be a regular expression. See documentation for more info. [GH-1029]
• New config function: split - Split a value based on a delimiter. This is useful for faking lists as parameters to modules.
• New resource: digitalocean_ssh_key [GH-1074]
• config: Expand ~ with homedir in file() paths [GH-1338]
• core: The serial of the state is only updated if there is an actual change. This will lower the amount of state changing on things like refresh.
• core: Autoload terraform.tfvars.json as well as terraform.tfvars [GH-1030]
• core: .tf files that start with a period are now ignored. [GH-1227]
• command/remote-config: After enabling remote state, a pull is automatically done initially.
• providers/google: Add size option to disk blocks for instances. [GH-1284]
• providers/aws: Improve support for tagging resources.
• providers/aws: Add a short syntax for Route 53 Record names, e.g. www instead of www.example.com.
• providers/aws: Improve dependency violation error handling, when deleting Internet Gateways or Auto Scaling groups [GH-1325].
• provider/aws: Add non-destructive updates to AWS RDS. You can now upgrade engine_version, parameter_group_name, and multi_az without forcing a new database to be created.[GH-1341]
• providers/aws: Full support for block device mappings on instances and launch configurations [GH-1045, GH-1364]
• provisioners/remote-exec: SSH agent support. [GH-1208]

BUG FIXES:

• core: module outputs can be used as inputs to other modules [GH-822]
• core: Self-referencing splat variables are no longer allowed in provisioners. [GH-795][GH-868]
• core: Validate that depends_on doesn't contain interpolations. [GH-1015]
• core: Module inputs can be non-strings. [GH-819]
• core: Fix invalid plan that resulted in "diffs don't match" error when a computed attribute was used as part of a set parameter. [GH-1073]
• core: Fix edge case where state containing both "resource" and "resource.0" would ignore the latter completely. [GH-1086]
• core: Modules with a source of a relative file path moving up directories work properly, i.e. "../a" [GH-1232]
• providers/aws: manually deleted VPC removes it from the state
• providers/aws: source_dest_check regression fixed (now works). [GH-1020]
• providers/aws: Longer wait times for DB instances.
• providers/aws: Longer wait times for route53 records (30 mins). [GH-1164]
• providers/aws: Fix support for TXT records in Route 53. [GH-1213]
• providers/aws: Fix support for wildcard records in Route 53. [GH-1222]
• providers/aws: Fix issue with ignoring the 'self' attribute of a Security Group rule. [GH-1223]
• providers/aws: Fix issue with sql_mode in RDS parameter group always causing an update. [GH-1225]
• providers/aws: Fix dependency violation with subnets and security groups [GH-1252]
• providers/aws: Fix issue with refreshing db_subnet_groups causing an error instead of updating state [GH-1254]
• providers/aws: Prevent empty string to be used as default health_check_type [GH-1052]
• providers/aws: Add tags on AWS IG creation, not just on update [GH-1176]
• providers/digitalocean: Waits until droplet is ready to be destroyed [GH-1057]
• providers/digitalocean: More lenient about 404's while waiting [GH-1062]
• providers/digitalocean: FQDN for domain records in CNAME, MX, NS, etc. Also fixes invalid updates in plans. [GH-863]
• providers/google: Network data in state was not being stored. [GH-1095]
• providers/heroku: Fix panic when config vars block was empty. [GH-1211]

PLUGIN CHANGES:

• New helper/schema fields for resources: Deprecated and Removed allow plugins to generate warning or error messages when a given attribute is used.

0.3.7 (February 19, 2015)

IMPROVEMENTS:

• New resources: google_compute_forwarding_rule, google_compute_http_health_check, and google_compute_target_pool - Together these provide network-level load balancing. [GH-588]
• New resource: aws_main_route_table_association - Manage the main routing table of a VPC. [GH-918]
• New resource: aws_vpc_peering_connection [GH-963]
• core: Formalized the syntax of interpolations and documented it very heavily.
• core: Strings in interpolations can now contain further interpolations, e.g.: foo ${bar("${baz}")}.
• provider/aws: Internet gateway supports tags [GH-720]
• provider/aws: Support the more standard environmental variable names for access key and secret keys. [GH-851]
• provider/aws: The aws_db_instance resource no longer requires both final_snapshot_identifier and skip_final_snapshot; the presence or absence of the former now implies the latter. [GH-874]
• provider/aws: Avoid unnecessary update of aws_subnet when map_public_ip_on_launch is not specified in config. [GH-898]
• provider/aws: Add apply_method to aws_db_parameter_group [GH-897]
• provider/aws: Add storage_type to aws_db_instance [GH-896]
• provider/aws: ELB can update listeners without requiring new. [GH-721]
• provider/aws: Security group support egress rules. [GH-856]
• provider/aws: Route table supports VPC peering connection on route. [GH-963]
• provider/aws: Add root_block_device to aws_db_instance [GH-998]
• provider/google: Remove "client secrets file", as it's no longer necessary for API authentication [GH-884].
• provider/google: Expose self_link on google_compute_instance [GH-906]

BUG FIXES:

• core: Fixing use of remote state with plan files. [GH-741]
• core: Fix a panic case when certain invalid types were used in the configuration. [GH-691]
• core: Escape characters \", \n, and \\ now work in interpolations.
• core: Fix crash that could occur when there are exactly zero providers installed on a system. [GH-786]
• core: JSON TF configurations can configure provisioners. [GH-807]
• core: Sort depends_on in state to prevent unnecessary file changes. [GH-928]
• core: State containing the zero value won't cause a diff with the lack of a value. [GH-952]
• core: If a set type becomes empty, the state will be properly updated to remove it. [GH-952]
• core: Bare "splat" variables are not allowed in provisioners. [GH-636]
• core: Invalid configuration keys to sub-resources are now errors. [GH-740]
• command/apply: Won't try to initialize modules in some cases when no arguments are given. [GH-780]
• command/apply: Fix regression where user variables weren't asked [GH-736]
• helper/hashcode: Update hash.String() to always return a positive index. Fixes issue where specific strings would convert to a negative index and be omitted when creating Route53 records. [GH-967]
• provider/aws: Automatically suffix the Route53 zone name on record names. [GH-312]
• provider/aws: Instance should ignore root EBS devices. [GH-877]
• provider/aws: Fix aws_db_instance to not recreate each time. [GH-874]
• provider/aws: ASG termination policies are synced with remote state. [GH-923]
• provider/aws: ASG launch configuration setting can now be updated in-place. [GH-904]
• provider/aws: No read error when subnet is manually deleted. [GH-889]
• provider/aws: Tags with empty values (empty string) are properly managed. [GH-968]
• provider/aws: Fix case where route table would delete its routes on an unrelated change. [GH-990]
• provider/google: Fix bug preventing instances with metadata from being created [GH-884].

PLUGIN CHANGES:

• New helper/schema type: TypeFloat [GH-594]
• New helper/schema field for resources: Exists must point to a function to check for the existence of a resource. This is used to properly handle the case where the resource was manually deleted. [GH-766]
• There is a semantic change in GetOk where it will return true if there is any value in the diff that is non-zero. Before, it would return true only if there was a value in the diff.

0.3.6 (January 6, 2015)

FEATURES:

• New provider: cloudstack

IMPROVEMENTS:

• New resource: aws_key_pair - Import a public key into AWS. [GH-695]
• New resource: heroku_cert - Manage Heroku app certs.
• provider/aws: Support eu-central-1, cn-north-1, and GovCloud. [GH-525]
• provider/aws: route_table can have tags. [GH-648]
• provider/google: Support Ubuntu images. [GH-724]
• provider/google: Support for service accounts. [GH-725]

BUG FIXES:

• core: temporary/hidden files that look like Terraform configurations are no longer loaded. [GH-548]
• core: Set types in resources now result in deterministic states, resulting in cleaner plans. [GH-663]
• core: fix issue where "diff was not the same" would come up with diffing lists. [GH-661]
• core: fix crash where module inputs weren't strings, and add more validation around invalid types here. [GH-624]
• core: fix error when using a computed module output as an input to another module. [GH-659]
• core: map overrides in "terraform.tfvars" no longer result in a syntax error. [GH-647]
• core: Colon character works in interpolation [GH-700]
• provider/aws: Fix crash case when internet gateway is not attached to any VPC. [GH-664]
• provider/aws: vpc_id is no longer required. [GH-667]
• provider/aws: availability_zones on ELB will contain more than one AZ if it is set as such. [GH-682]
• provider/aws: More fields are marked as "computed" properly, resulting in more accurate diffs for AWS instances. [GH-712]
• provider/aws: Fix panic case by using the wrong type when setting volume size for AWS instances. [GH-712]
• provider/aws: route table ignores routes with 'EnableVgwRoutePropagation' origin since those come from gateways. [GH-722]
• provider/aws: Default network ACL ID and default security group ID support for aws_vpc. [GH-704]
• provider/aws: Tags are not marked as computed. This introduces another issue with not detecting external tags, but this will be fixed in the future. [GH-730]

0.3.5 (December 9, 2014)

FEATURES:

• Remote State: State files can now be stored remotely via HTTP, Consul, or HashiCorp's Atlas.
• New Provider: atlas: Retrieve artifacts for deployment from HashiCorp's Atlas service.
• New element() function to index into arrays

IMPROVEMENTS:

• provider/aws: Support tenancy for aws_instance
• provider/aws: Support block devices for aws_instance
• provider/aws: Support virtual_name on block device
• provider/aws: Improve RDS reliability (more grace time)
• provider/aws: Added aws_db_parameter_group resource
• provider/aws: Added tag support to aws_subnet
• provider/aws: Routes in RouteTable are optional
• provider/aws: associate_public_ip_address on aws_launch_configuration
• provider/aws: Added aws_network_acl
• provider/aws: Ingress rules in security groups are optional
• provider/aws: Support termination policy for ASG
• provider/digitalocean: Improved droplet size compatibility

BUG FIXES:

• core: Fixed issue causing double delete. [GH-555]
• core: Fixed issue with create-before-destroy not being respected in some circumstances.
• core: Fixing issue with count expansion with non-homogenous instance plans.
• core: Fix issue with referencing resource variables from resources that don't exist yet within resources that do exist, or modules.
• core: Fixing depedency handling for modules
• core: Fixing output handling [GH-474]
• core: Fixing count interpolation in modules
• core: Fixing multi-var without module state
• core: Fixing HCL variable declaration
• core: Fixing resource interpolation for without state
• core: Fixing handling of computed maps
• command/init: Fixing recursion issue [GH-518]
• command: Validate config before requesting input [GH-602]
• build: Fixing GOPATHs with spaces

MISC:

• provider/aws: Upgraded to helper.Schema
• provider/heroku: Upgraded to helper.Schema
• provider/mailgun: Upgraded to helper.Schema
• provider/dnsimple: Upgraded to helper.Schema
• provider/cloudflare: Upgraded to helper.Schema
• provider/digitalocean: Upgraded to helper.Schema
• provider/google: Upgraded to helper.Schema

0.3.1 (October 21, 2014)

IMPROVEMENTS:

• providers/aws: Support tags for security groups.
• providers/google: Add "external_address" to network attributes [GH-454]
• providers/google: External address is used as default connection host. [GH-454]
• providers/heroku: Support locked and personal booleans on organization settings. [GH-406]

BUG FIXES:

• core: Remove panic case when applying with a plan that generates no new state. [GH-403]
• core: Fix a hang that can occur with enough resources. [GH-410]
• core: Config validation will not error if the field is being computed so the value is still unknown.
• core: If a resource fails to create and has provisioners, it is marked as tainted. [GH-434]
• core: Set types are validated to be sets. [GH-413]
• core: String types are validated properly. [GH-460]
• core: Fix crash case when destroying with tainted resources. [GH-412]
• core: Don't execute provisioners in some cases on destroy.
• core: Inherited provider configurations will be properly interpolated. [GH-418]
• core: Refresh works properly if there are outputs that depend on resources that aren't yet created. [GH-483]
• providers/aws: Refresh of launch configs and autoscale groups load the correct data and don't incorrectly recreate themselves. [GH-425]
• providers/aws: Fix case where ELB would incorrectly plan to modify listeners (with the same data) in some cases.
• providers/aws: Retry destroying internet gateway for some amount of time if there is a dependency violation since it is probably just eventual consistency (public facing resources being destroyed). [GH-447]
• providers/aws: Retry deleting security groups for some amount of time if there is a dependency violation since it is probably just eventual consistency. [GH-436]
• providers/aws: Retry deleting subnet for some amount of time if there is a dependency violation since probably asynchronous destroy events take place still. [GH-449]
• providers/aws: Drain autoscale groups before deleting. [GH-435]
• providers/aws: Fix crash case if launch config is manually deleted. [GH-421]
• providers/aws: Disassociate EIP before destroying.
• providers/aws: ELB treats subnets as a set.
• providers/aws: Fix case where in a destroy/create tags weren't reapplied. [GH-464]
• providers/aws: Fix incorrect/erroneous apply cases around security group rules. [GH-457]
• providers/consul: Fix regression where key param changed to `keys. [GH-475]

0.3.0 (October 14, 2014)

FEATURES:

• Modules: Configuration can now be modularized. Modules can live on GitHub, BitBucket, Git/Hg repos, HTTP URLs, and file paths. Terraform automatically downloads/updates modules for you on request.
• New Command: init. This command initializes a Terraform configuration from an existing Terraform module (also new in 0.3).
• New Command: destroy. This command destroys infrastructure created with apply.
• Terraform will ask for user input to fill in required variables and provider configurations if they aren't set.
• terraform apply MODULE can be used as a shorthand to quickly build infrastructure from a module.
• The state file format is now JSON rather than binary. This allows for easier machine and human read/write. Old binary state files will be automatically upgraded.
• You can now specify create_before_destroy as an option for replacement so that new resources are created before the old ones are destroyed.
• The count metaparameter can now contain interpolations (such as variables).
• The current index for a resource with a count set can be interpolated using ${count.index}.
• Various paths can be interpolated with the path.X variables. For example, the path to the current module can be interpolated using ${path.module}.

IMPROVEMENTS:

• config: Trailing commas are now allowed for the final elements of lists.
• core: Plugins are loaded from ~/.terraform.d/plugins (Unix) or %USERDATA%/terraform.d/plugins (Windows).
• command/show: With no arguments, it will show the default state. [GH-349]
• helper/schema: Can now have default values. [GH-245]
• providers/aws: Tag support for most resources.
• providers/aws: New resource db_subnet_group. [GH-295]
• providers/aws: Add map_public_ip_on_launch for subnets. [GH-285]
• providers/aws: Add iam_instance_profile for instances. [GH-319]
• providers/aws: Add internal option for ELBs. [GH-303]
• providers/aws: Add ssl_certificate_id for ELB listeners. [GH-350]
• providers/aws: Add self option for security groups for ingress rules with self as source. [GH-303]
• providers/aws: Add iam_instance_profile option to aws_launch_configuration. [GH-371]
• providers/aws: Non-destructive update of desired_capacity for autoscale groups.
• providers/aws: Add main_route_table_id attribute to VPCs. [GH-193]
• providers/consul: Support tokens. [GH-396]
• providers/google: Support target_tags for firewalls. [GH-324]
• providers/google: google_compute_instance supports can_ip_forward [GH-375]
• providers/google: google_compute_disk supports type to support disks such as SSDs. [GH-351]
• provisioners/local-exec: Output from command is shown in CLI output. [GH-311]
• provisioners/remote-exec: Output from command is shown in CLI output. [GH-311]

BUG FIXES:

• core: Providers are validated even without a provider block. [GH-284]
• core: In the case of error, walk all non-dependent trees.
• core: Plugin loading from CWD works properly.
• core: Fix many edge cases surrounding the count meta-parameter.
• core: Strings in the configuration can escape double-quotes with the standard \" syntax.
• core: Error parsing CLI config will show properly. [GH-288]
• core: More than one Ctrl-C will exit immediately.
• providers/aws: autoscaling_group can be launched into a vpc [GH-259]
• providers/aws: not an error when RDS instance is deleted manually. [GH-307]
• providers/aws: Retry deleting subnet for some time while AWS eventually destroys dependencies. [GH-357]
• providers/aws: More robust destroy for route53 records. [GH-342]
• providers/aws: ELB generates much more correct plans without extranneous data.
• providers/aws: ELB works properly with dynamically changing count of instances.
• providers/aws: Terraform can handle ELBs deleted manually. [GH-304]
• providers/aws: Report errors properly if RDS fails to delete. [GH-310]
• providers/aws: Wait for launch configuration to exist after creation (AWS eventual consistency) [GH-302]

0.2.2 (September 9, 2014)

IMPROVEMENTS:

• providers/amazon: Add ebs_optimized flag. [GH-260]
• providers/digitalocean: Handle 404 on delete
• providers/digitalocean: Add user_data argument for creating droplets
• providers/google: Disks can be marked auto_delete. [GH-254]

BUG FIXES:

• core: Fix certain syntax of configuration that could cause hang. [GH-261]
• core: -no-color flag properly disables color. [GH-250]
• core: "~" is expanded in -var-file flags. [GH-273]
• core: Errors with tfvars are shown in console. [GH-269]
• core: Interpolation function calls with more than two args parse. [GH-282]
• providers/aws: Refreshing EIP from pre-0.2 state file won't error. [GH-258]
• providers/aws: Creating EIP without an instance/network won't fail.
• providers/aws: Refreshing EIP manually deleted works.
• providers/aws: Retry EIP delete to allow AWS eventual consistency to detect it isn't attached. [GH-276]
• providers/digitalocean: Handle situations when resource was destroyed manually. [GH-279]
• providers/digitalocean: Fix a couple scenarios where the diff was incorrect (and therefore the execution as well).
• providers/google: Attaching a disk source (not an image) works properly. [GH-254]

0.2.1 (August 31, 2014)

IMPROVEMENTS:

• core: Plugins are automatically discovered in the executable directory or pwd if named properly. [GH-190]
• providers/mailgun: domain records are now saved to state

BUG FIXES:

• core: Configuration parses when identifier and '=' have no space. [GH-243]
• core: depends_on with count generates the proper graph. [GH-244]
• core: Depending on a computed variable of a list type generates a plan without failure. i.e. ${type.name.foos.0.bar} where foos is computed. [GH-247]
• providers/aws: Route53 destroys in parallel work properly. [GH-183]

0.2.0 (August 28, 2014)

BACKWARDS INCOMPATIBILITIES:

• We've replaced the configuration language in use from a C library to a pure-Go reimplementation. In the process, we removed some features of the language since it was too flexible:
  • Semicolons are no longer valid at the end of lines
  • Keys cannot be double-quoted strings: "foo" = "bar" is no longer valid.
  • JSON style maps { "foo": "bar" } are no longer valid outside of JSON. Maps must be in the format of { foo = "bar" } (like other objects in the config)
• Heroku apps now require (will not validate without) region and name due to an upstream API change. [GH-239]

FEATURES:

• New Provider: google: Manage Google Compute instances, disks, firewalls, and more.
• New Provider: mailgun: Manage mailgun domains.
• New Function: concat: Concatenate multiple strings together. Example: concat(var.region, "-", var.channel).

IMPROVEMENTS:

• core: "~/.terraformrc" (Unix) or "%APPDATA%/terraform.rc" (Windows) can be used to configure custom providers and provisioners. [GH-192]
• providers/aws: EIPs now expose allocation_id and public_ip attributes.
• providers/aws: Security group rules can be updated without a destroy/create.
• providers/aws: You can enable and disable dns settings for VPCs. [GH-172]
• providers/aws: Can specify a private IP address for aws_instance [GH-217]

BUG FIXES:

• core: Variables are validated to not contain interpolations. [GH-180]
• core: Key files for provisioning can now contain ~ and will be expanded to the user's home directory. [GH-179]
• core: The file() function can load files in sub-directories. [GH-213]
• core: Fix issue where some JSON structures didn't map properly into Terraform structures. [GH-177]
• core: Resources with only file() calls will interpolate. [GH-159]
• core: Variables work in block names. [GH-234]
• core: Plugins are searched for in the same directory as the executable before the PATH. [GH-157]
• command/apply: "tfvars" file no longer interferes with plan apply. [GH-153]
• providers/aws: Fix issues around failing to read EIPs. [GH-122]
• providers/aws: Autoscaling groups now register and export load balancers. [GH-207]
• providers/aws: Ingress results are treated as a set, so order doesn't matter anymore. [GH-87]
• providers/aws: Instance security groups treated as a set [GH-194]
• providers/aws: Retry Route53 requests if operation failed because another operation is in progress [GH-183]
• providers/aws: Route53 records with multiple record values work. [GH-221]
• providers/aws: Changing AMI doesn't result in errors anymore. [GH-196]
• providers/heroku: If you delete the config_vars block, config vars are properly nuked.
• providers/heroku: Domains and drains are deleted before the app.
• providers/heroku: Moved from the client library bgentry/heroku-go to cyberdelia/heroku-go [GH-239].
• providers/heroku: Plans without a specific plan name for heroku_addon work. [GH-198]

PLUGIN CHANGES:

• New Package: helper/schema. This introduces a high-level framework for easily writing new providers and resources. The Heroku provider has been converted to this as an example.

0.1.1 (August 5, 2014)

FEATURES:

• providers/heroku: Now supports creating Heroku Drains [GH-97]

IMPROVEMENTS:

• providers/aws: Launch configurations accept user data [GH-94]
• providers/aws: Regions are now validated [GH-96]
• providers/aws: ELB now supports health check configurations [GH-109]

BUG FIXES:

• core: Default variable file "terraform.tfvars" is auto-loaded. [GH-59]
• core: Multi-variables (foo.*.bar) work even when count = 1. [GH-115]
• core: file() function can have string literal arg [GH-145]
• providers/cloudflare: Include the proper bins so the cloudflare provider is compiled
• providers/aws: Engine version for RDS now properly set [GH-118]
• providers/aws: Security groups now depend on each other and
• providers/aws: DB instances now wait for destroys, have proper dependencies and allow passing skip_final_snapshot
• providers/aws: Add associate_public_ip_address as an attribute on the aws_instance resource [GH-85]
• providers/aws: Fix cidr blocks being updated [GH-65, GH-85]
• providers/aws: Description is now required for security groups
• providers/digitalocean: Private IP addresses are now a separate attribute
• provisioner/all: If an SSH key is given with a password, a better error message is shown. [GH-73]

0.1.0 (July 28, 2014)

• Initial release